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Part A. Foundations: what a plant needs and how it works

1. 1What is hydroponics (existing page; light refresh last) Level 1 Define soilless culture, know its history
2. 2What a plant needs: the seven inputs Level 1 List light, CO₂, water, O₂, mineral elements, temperature, support; explain why soil is optional
3. 3How plants are built: cells, tissues, roots and shoots (coming) Level 1 Name the organs and tissues that matter to a grower and what each does
4. 4Photosynthesis and respiration for growers Level 1 Explain where biomass comes from, why roots need oxygen, what limits growth
5. 5Water in the plant: uptake, transpiration and humidity Level 2 Explain transpiration, why nutrients travel with water, what VPD is
6. 6What plants are made of: the essential elements Level 1 Name the essential mineral elements, the essentiality criteria, typical tissue concentrations, mobile vs immobile
7. 7How roots take up nutrients Level 2 Explain ions, mass flow vs diffusion, active uptake, charge balance, why uptake moves pH